Securing device for covers of dynamo-electric machines



(NoModeL) N. O. BASSETT. SBGURING DEVIUE' FOR COVERS OF DYNAMO ELEGTRIG MACHINES. No. 596,135. Patented Dec, 28,1897.

K Wrrplzssas. IHVEN U Mmw Q9. bmmq UNITED STATES ATENT OFFICE.

NORMAN C. BASSETT, OF LYNN, MASSACHUSETTS, ASSIGNOR TO THE GENERAL ELECTRIC COIIIPANY, OF NEIV YORK.

SECURING DEVICE FOR COVERS 0F DYNAMO-ELECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent No. 596,135, dated December 28, 1897.

Application filed March 2'7, 1897. Serial lIo. 629,464. (No model.)

To ctZZ whom it may concern:

Be it known that I, NORMAN C. Bassnrr, a citizen of the United States, residing at Lynn, in the county of Essex, State of Massachusetts, have invented certain new and useful Improvements in Securing Devices for Gov ers of Dynamo-Electric Machines, (Case No. 549,) of which the following is a specification.

The present invention relates to means for securing the covers of dynamo-electric machines, and has its greatest utility in connection with motors employed on electric railways.

The present invention has for its object to provide a securing device for the covers of railway-motors or other like machines, which is mounted on the machine, thereby doing away with loose parts, and which is adjustable and so arranged that a simple movement will relieve the pressure on the cover, yet when the device is in its closed position any lifting tendency of the cover only serves to seat it more firmly.

In the accompanying drawings, attached to and made a part of this specification, Figure 1 is a side elevation of a motorprovided with my improved securing device. Fig. 2 is a side elevation of the cover; Fig. 3, a plan of one end of the cover, and Fig. 4; an end View of the same.

My invention is shown as applied to a railway-motor of the ordinary waterproof type.

The inclosing case of motor A is divided into two parts, and upon the upper part is mounted a cover B, which is removed when it is desired to inspect the interior of the motor. On the ends of the cover are lugs C D, slotted to receive the clamping devices E F, the slots registering with the lugs H on the casing. The clamping devices are similarly constructed, and each is provided with a screw-threaded bolt G, mounted in a lug H, cast integral with the motor-inclosing frame. The upper end of the bolt has two surfaces, forming a bearing for the forked end of the handle I. The handle is pivoted to bolt G by pin J and is provided with laterally-projecting cams K, engaging with the top side of the cover. The cams K are arranged to work over a dead-center. As shown in the drawings, the cams K are in engagement with the cover at a point outside of the center line of the bolt, and any tendency of the cover to lift only causes the handle I to be seated more firmly in position. Projections L are provided on the upper side of the cover B and are adapted to prevent the handle from turning by engaging with a lug O on its under side.

The under side of the cover is provided with a channel in which is mounted a strip of felt or similar material M, (shown in dotted lines,) protecting the interior of the motor from dirt and water. As the felt wears or is compressed it is necessary to adjust the clamping devices. This is done by raising the handle until the cams K are out of engagement with the cover and giving it one or more turns, which will vary the vertical height of the bolt G and cause the cams to force the cover downward when the handle is moved to the closed position. The lugs C on the left-hand end of the cover are made somewhat longer than those on the right to provide for a cotter-pin P, which is arranged to hold the cover on the motor after the securing devices have been released and the cover swung around.

To release the cover, the securing devices E and F are moved outward to the dottedline position around the pin J as a center, as

shown in Fig. 2, and the cover is then lifted from one end and swung around the bolt G as a pivot. It will be seen that the side portions of the handle are narrower than the slot between the lugs on the cover, and that when the handle is thrown to its extreme outer position the cams K are out of the way and the cover can be removed.

What I claim as new, and desire to secure by Letters Patent of the United States,.is

1. In a device for securing the cover of a dynamo-electric machine, the combination of a pivoted handle, a screw-threaded bolt upon which the handle is pivoted, a cam on the handle engaging with the cover, and a lug on the under side of the handle engaging with a projection on the base to prevent it from turning.

2. In combination, an inclosing case for a dynamo electric machine, a removable cover therefor, slots in the cover registering with projeeting cams on the handles resting 011 the cover adjacent to the slots, so arranged that when the handle is thrown to its open position, they are out of the path of the cover so that it can be removed.

In witness whereof I have hereunto set my hand this 24th day of March, 1897.

NORMAN C. BASSETT.

Witnesses J OHN W. GIBBoNEY, HENRY OTTESTENDARP. 

